TABLETIZER

ELECTRONIC SUB-SYSTEMS FOR CONVERTING GRAPHIC INFORMATION TO DIGITAL DATA ("DIGITIZING") AND FOR OPERATOR CONTROL OF THE GRAPHIC SYSTEM, EACH TERMINAL OF SUCH SUB-SYSTEM CONSISTING OF AN ELECTRONIC DATA TABLET, ELECTRONIC PENS FOR DATA AND COMMAND ENTRY, ONE OR MORE KEYBOARDS, AND A GRAPHIC DISPLAY OR A LINE PLOTTER, TOGETHER WITH CONTROL ELECTRONICS AND OTHER PARTS AND COMPONENTS THEREOF